Heavy Duty Test Clip · 100A · Non-Insulated Copper · Mueller Electric BU-21CPN
100A non-insulated heavy duty test clip with copper construction and approximately 1.06 in (26.9 mm) jaw opening. Commonly used for temporary high-current test connections, grounding, and bench or field service work.
What this product is for
This heavy duty test clip is used for temporary electrical connection in test, service, grounding, and power transfer setups where a strong mechanical grip and high current capacity are required. It is a non-insulated copper clip rated at 100A.
Use for
- Temporary high-current test connections
- Bench testing and service work
- Grounding and bonding leads
- Custom test lead assemblies
Avoid for
- Permanent building wiring terminations
- Applications requiring touch-safe insulation
- Corrosive environments unless the full assembly is suited to the conditions
Best for
Electricians, technicians, and maintenance staff who need a reusable heavy duty clip for temporary connection during troubleshooting, testing, or equipment servicing.
Installed in
Typically fitted onto test leads, grounding leads, service assemblies, and shop or field diagnostic equipment. This is commonly used as a component in a lead assembly rather than as a standalone installed wiring device.
Why this product exists
It provides a fast temporary connection point where bolted or permanent terminations are not practical. The non-insulated copper body supports conductivity and clamp strength for demanding test applications.
Compared with similar products
Compared with insulated clips, this version leaves the metal body exposed and is better suited where installers need direct access, custom insulation choices, or replacement in existing lead sets. Compared with lighter duty clips, the 100A rating and approximately 1.06 in (26.9 mm) jaw opening make it more suitable for larger conductors, bus points, and battery or grounding work.
Typical buying guidance only: choose insulated clips where accidental contact is a concern, and confirm the full lead assembly ampacity based on cable size, termination method, and duty cycle. Actual performance depends on installation conditions and assembly design.
Specifications
- Manufacturer: Mueller Electric
- Manufacturer part number: BU-21CPN
- Product type: Heavy duty test clip
- Current rating: 100A
- Insulation: Non-insulated
- Material: Copper
- Jaw opening: 1.060 in (26.92 mm)
- Series: BU
- Packaging: Bulk
- Status: Active
- SeriesBU
- MaterialCopper
- Current Rating100A
- PackagingBulk
- InsulationNon-insulated
- StatusActive
- Jaw Opening1.060 in (26.92 mm)
- BrandsMueller Electric
- Stock in Elmira2
- Stock in Flesherton2
Aptico Supply Delivery
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Aptico Supply helps electricians, contractors, and commercial buyers get the electrical materials they need without unnecessary delays. Whether you are ordering for a jobsite, restocking service inventory, or arranging pickup, our delivery options are designed to keep work moving.
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Free daily delivery is available for larger contractor accounts.
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Free weekly delivery is available for smaller accounts in select service areas.
- Elmira area delivery: Tuesday
- Flesherton area delivery: Thursday
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- Flesherton pickup available
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Delivery Questions
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Can I pick up my order?
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Do delivery charges apply?
Delivery charges may apply outside regular local routes, for smaller orders, or for oversized and heavy items.
Can you deliver to jobsites?
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